The extract contains IGF-1, which is on the NFL’s list of banned substances.

Lewis, who will be playing his final game Sunday in Super Bowl XLVII as he enters retirement, returned to play in the Ravens’ first playoff game against the Colts on Jan. 6 from a torn triceps he sustained in Week 6.

Lewis dismissed the report during Tuesday’s Media Day session, quipping, “next question,” when asked about the SI story. Later, when asked again about the SI report, he said: “To even entertain stupidity like that, tell them to get a story off somebody else.”

The substance, SI reported, allegedly was provided by Sports with Alternatives to Steroids (S.W.A.T.S.) owner Mitch Ross, who claims that he has recorded conversations with Lewis from October 2012.